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  1. G

    Black spark plugs

    Thanks for an answer, shouldn't i be blue smoke from exhaust if oil is burning? If I won't find any other solution I will try to remove carbs and clean them again.
  2. G

    Black spark plugs

    Hello, I have a problem with my Honda CB750 bol D'or 1981', It seems that it is running to rich, when hardly accelerating it looks that not all fuel is being burned and that confirms spark plugs, 3 are completely black and one is OK. Carbs were just rebuilt, cleaned in ultrasonic bath, all...
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